Sandvik 27.31.4.LCuR description: Sandvik 27.31.4.LCuR is a covered electrode of AWS 383-16 type with rutile-basic coating and normal metal recovery for welding of high-alloy austenitic stainless steels of UNS S08028 (e.g. Sanicro 28) and Alloy 825 type (e.g. Sanicro 41).